Snatch block

Details Snatch block Snatch block

1979-11-08

1982-04-20

Spar, Robert J.

Implements or apparatus for applying pushing or pulling force

Device or member for contacting and guiding moving cable

Including rotatable, cable contacting, pulley wheel element

254413, 114204, B66D 136

Patent

active

043255370

ABSTRACT:
A novel snatch block particularly suitable for marine use and for movement on a boat deck mounted track, comprising a track slide portion and an upper sheave assembly. The sheave assembly comprises a pair of normally spaced-apart side cheeks; a sheave pin extending between said cheeks; and a sheave rotatably mounted on said sheave pin. Structure is provided for holding the sheave pin at one end to one of the side cheeks, and releasably engaging the sheave pin at the opposite end with the other of the side cheeks to hold the sheave assembly in a normally closed position. Both the side cheeks are pivotally mounted on the slide portion so that with release of one of the side cheeks by the sheave pin, the sheave assembly is capable of expanding to a wider opening than available with conventional snatch blocks.

REFERENCES:
patent: 733239 (1903-07-01), Maddox
patent: 2202184 (1940-05-01), Berger
patent: 2288116 (1942-06-01), Stillwagon
patent: 2555059 (1951-05-01), Schrader
patent: 2723834 (1955-11-01), Burke et al.
patent: 2772857 (1956-12-01), Bush
patent: 3199841 (1965-08-01), McKean
patent: 3372908 (1968-03-01), McCarthy
patent: 3678876 (1972-07-01), Alter

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